This is, very simply, just a single gauge in your P-51D cockpit - the airspeed gauge - translated from MPH to KPH, by popular request from the Euros out there.

PLEASE NOTE: The P-51D's IAS gauge is VERY not surgical or precise in reality, nor is it in DCS. It's close/good enough to fly safely, thats about it. It is a progressive dial instrument, which means that as the needle sweeps around the gauge face, it may read more/fewer measured units per X number of degrees swept by the gauge needle.

As such - the gauge was designed with Miles Per Hour in mind - I've set the large tick marks at 100 KPH increments and done my best to make it usable - the smaller ticks are 20kph increments, the rest you can figure out just be eyeballing it, it should make sense (as much as the MPH one does anyway in terms of its stupid progressive increments!)

As always, if you find anything wrong with my mods, need a hurt feelings report to fill out and submit to ED, or just need someone to talk about donuts with at 2am, I've been banned from the DCS forums and my email address is herrijam@gmail.com